Mara
Another low-budget bogeyman horror movie, about a sleep paralysis demon called Mara. Olga Kurylenko is a "rookie" police psychologist (she's like 40?) investigating. A dude is killed in his sleep and the police decide to arrest the wife, who's huffing and puffing around the living room like a 28 Days Later zombie, apparently solely based on the shrink's recommendation - which seems so implausible I never connected with Olga's guilt over separating the mom from her kid. Yet the movie treats it like this was entirely on her, and terribly important at that.
The sleep paralysis demon is played by the clinically and professionally emaciated Javier Botet, of REC/It/Slender Man/Insidious/The Conjuring cred. The movie doesn't make much of the creature. In concept all you can do with it is have a character lying down, looking terrified around the room, and then, you know, the bogeyman shows up and strangles them without further ado. It's not like with Freddy where you can play on the same fear of helplessness but also go wild with the nightmares.
The one creepy part is a character clipping one of his eyelids so he won't fall asleep. It's off camera but the shot holds long enough to sell the ick.